I'm having an issue with this. I have made a room in Sketchup, and as of now I'm able to import it to the game using SharpOcarina and play on it just fine. But whenever I add more stuff to the room in Sketchup and try to import it to the game, the game freezes when I select the room. So now I'm stuck at a room that's 20% complete... because if I do any more with it the game freezes.